Factual error: During the first few minutes of the film we see Major Payne report into the General. Major Payne then salutes, however, he does not have a cover on his head. As per USMC/Naval Customs and Courtesies, Marines only render the proper greeting of the day when reporting to a superior officer without a cover, they don't salute. (00:03:20)
Factual error: When Damon Wayans gives the nurse the bullet, explaining that he had removed it from his heart (presumably having been shot with it), the bullet is still whole, i.e. including the cartridge.
Factual error: When Payne is at the train station considering boarding it for Washington DC to return to active duty, it's a southbound train. The station he's in is Ashland, VA - DC is north from there.
Answer: The credits are in alphabetical order (according to last name). He did get top billing in the opening credits though. Damon is actually listed 25th in the end credits, after his nephew, so I don't know what you saw where he was listed 7th or 8th.
Bishop73
I have the movie, and his name is right after his nephew's, so I guess I got the place wrong.